Mouthpiece for brush-making machines



UNITED STATES PATENT OFFICE.

JOSEPH MAYER, 01E,TROY,y NEW YORK, ASSIGNOR TO JOHN A. MURRAY, OF ALBANYNEW YORK.

MOUTHPIECE FOR BRUSH-MAKING MACHINES.

' Specification of Letters Patent. Patent/Qd Allg'.

Application led February 19, 1920. Serial YNo. 359,892.

To all whom Vif may concern:

Be it known that I, JOSEPH WV. MAYER, a citizen of the United States,residing at Troy, in the countyy of Rensselaer and State of New York,have invented new and useful Improvements in Mouthpieces forBrush-Making Machines, of which the fol-v lowing is a specification.

Reference may be had to the accompanying drawings, and the referencecharacters marked thereon, which yform a part of this specification.Similar characters refer to l similar parts in the several figurestherein.

This invention relates to'abrush-'making machine 1n the use of whichsmall bunches Y. rof bristles or the like are doubled and driven in`connectionfwith ya wire staple` into a close-fitting aperture in abrush-back `or block.v

In such machines the bristles are embraced midway of their length by thestaple and the staple andbristles are then together forcedA through aconvergingthroat or mouth-piece, causing the bristles to be doubled andto leave the contracted end ofthev throat or mouth-piece in compactform.

The interior of such a bristle-feeding throat orrmouth-piece must bequite accurately formed, and in machines adapted for making the smallerbrushes such as hairlbrushes, the throat or mouth-piece is of withoppositely disposed grooves'very accurately formed for guiding thestaple, for unless the staple is accurately guided it will not beproperly presented to the brush-back and will tend to buckle or bend'when driven into the brush-back.

On account of this difficulty it has been customary to-make such athroat or mouthpiece of comparatively soft easily workable metal, as aresult of which thethroat or mouth-piece becomes soon wornso that theform and size of the passageway therethrough, and particularly the formand size of the staple-guiding grooves, are materially changed, becomeenlarged by wear and fail to properly guide the staples. 4

The principal objects of the invention are to secure greater accuracyand longer period of usefulnessv of such a throat or mouthpiece; and tofacilitate the manufacture and repair of the same.

Other objects will appear in connection with the followingV description.

Figure l of the drawings is a view in front'eles'fation of a metalblockadapted to be formed into the body of such a throat or mouth-piece.

Fig. 2 is a view in side elevation of the same.

Fig.'3 is a top plan view of the same with four holes drilled therein,the two middle holes being filled'by driven-in temporary plugs or pins.

Fig. l is a similar view showing the portion of the block and of saidplugs between the twoV outermost bored holes chipped out to form adownwardly contracted slotted opening through the block.

. Fig. 5 is a similar view of thelinished vthroat or mouth-piece showingthe upper end 4of the slot extending through the side walls of the blockand the temporary plugs replaced by grooved plugs adapted to vform astaple-guide.

Y Fig. 6y is a View in front elevation ofthe finished throat ormouth-piece.

Fig. 7 is a side view of the same.

Fig. 8 is a vertical cross section of the same taken on the broken line8-8 in Fig. 7.

Fig. 9 is a'horizontal section of the same taken on the broken line 9 9in Fig. 7.

Referring to the drawings wherein the invention isshown in preferredform, the mouth-piece as shown in Figs. 5 to 9 inclusive comprises ablock l, a ypair of plugs or pins, 2, secured by cross-pins, 3, inapertures, extending vertically through the block.

In Figs. l, 2, 8, and 4, Iv have shown the block in process ofmanufacture.

In making my improvedmouth-piece, I employ a block of substantially theform shown in Figs. l, 2 and 3, through which block I drill twoapertures, -l and 5, convergently from the upper to the lower endtending through the axes of said apertures,

4 and 5.

Into these respective apertures, 6 and 7 I drive close-fitting plugs orpins, 2. I then bore and chip out by suitable tools the parts of theblock and of said plugs and pins, and 9, between said apertures, 4 and5, thus forming a downwardly tapered slot, 10, vleading to `an outletaperture, 11, in. the

in its passage through the mouth-piece.;

The permanenttpins or plugs, 12, and 13, are secured in position bycrossfpins, v3, inserted therethrough and through the bloclr.

This method of constructing the vmouth- -piece enables me to veryaccurately for-m and locate the staple-guiding grooves, 14, as well asto insure longlife for said grooves,

because the'pins or plugs', 12, 13, can be separately formed, groovedVand hardened or tempered before they arev inserted in the' block, 1.

Byf employing the Vtemporary pins, 2', which' can be made offcomparatively soft metal, I am able to facilitate thel accurateformation of the slot, 10,'through lthe block.

The apertures, Gandf, and14. and 5,.can be' very accurately drilledbyfmeans of a. suitable jigso 'thatthe aperti'ires,v 6` and 7,'. willbe' very accurately located forreception.

of the permanent pins or plugs, 12, 13; .Variationsor irregularities inchipping through the tempora'ryplugs yorvpins, 2,A in

' forming the slot, 10, therefore become im 40s materialibecausejthesepinsv are replaced uby the permanentpins or plugs, 12,.,13, in whichk theL staple-guiding grooves, 14, can be very l accuratelyformed before the pins are'inserted inV the'block, and thereceivingapertures, 6 and 7,.for saidvpe'rmanent` pins' being accuratelylocated', the Vstaple-guiding" grooves, 14, will necessarily be veryaccuLIV rately located. y The permanent driving out the cross-pins, 3,and then' driving outthe pins, 12', 13," andreplacingfthe same by'n'ewsimilar pins' or plugsf Ik am thus vablev not only tol 'prolong theuseful life of the mout'l'i-pieceby renew-alfv from timeto time ofthe-pins,12,`13,`which forni the" staple-guiding grooves, butV also tosecure a highdegreeof accuracy-'inthe form of V-the fstaple-guidifnggroovesl;

pins or plugs, 12,513; be renewed when they become worn, first" Theslot, 10, which serves to guide the bristles as" they arerdriven by`thestaple downwardlV through the"m`outhpieee may have its upper endextended through the side wallsof the block as shown at 15, if

desired The block1, whichis of general rectangular fi'infis machined tothe inishedform shown ingFigs. ,ff,., a iid8, after the groove, 10, hasbeen formed therein. Y

lVhat I claim as new and desire tb secure, byLe'tter's' `Patent is 1.xnA bristle-feeding mouthpiece for brushmaking .machinesa .comprisingvanyv` integral blOQlrprOV-ided with a downwardly tapered Ybristle-guiding slot therethrough,jand on opposite sides ofl said slotVdrilled apertures open' on the inner side to said slot, and pins tightlyfitting said respective'rdrilled aper- Y Y tures,.said. pins being.cut-.awayV on their inner sidestofconform to'. said. slot and beingprovided with, oppositely disposed staple'- guiding grooves. .n I

2i A bristle-feeding mouth-'piece for brush- Y makinel machines Icomorisinf an" integral C b D block provided with 1a downwardly taperedvbristle-'guiding slot therethrough, and on opposite sidesof said slotdrilled apertures open on the inner side toV said slot, and lpinstightly fitting said ..respective drilled'apertures,` said pinsfb'eingcutawayon'their innersid/es to conform to said slot( and being Yprovided with oppositelyV disposedA Vstapleguiding grooves, 'fand.cross-pins i insertedY tlrroughV said block` and said tightsfitti'ng.,pins... .Y

- a' Thaampimnf iiiI the aa' .of makchineswhichiconsists inYdrilling-two convergehtv` apertures. from :top tos lbottomr through. a.suitable `block, and' two other parallel aperturesifron'i top to bottom'through said block on A oppositeV sidesl of and close to n a'plane'fextending"through the axes .of saidV convergent apertures,inserting close fittingv temporary plugs or pins in" said parallelapertures', cuttir'igout"thematerialr of said block andsaid pins tolform a` downwardly tapered slot extending from one'to the other?off-said convergent'l aperti`1re`s,removing said temporaryipis orplugs,and .inserting in placel thereof in said respective parallel aperturespermanent plugs o'r pins con'-4 forming tol-.said slotfand provided 1on'their innlei'fac'es with oppositelyf disposed staple# guidinggrooves.

In? testimony whereof,-II Vhave 'hereunto set;

m'yiiantrthis13th davof'rebrary, i920.

A. f u JOsEPH WMAYER.

